Federal regulations · Through 2026-08-25 · Newer source version available

47 CFR 90.267: Assignment and use of frequencies in the 450-470 MHz band for low power use.

(a) The following frequencies between 450-470 MHz are designated for low-power use subject to the provisions of this section. For purposes of this section these frequencies are referred to as “low power frequencies.” Pairs are shown but single frequencies are available for simplex operations.
(b) Group A1 Frequencies. The Industrial/Business Pool frequencies in Group A1 are available on a coordinated basis, pursuant to §§ 90.35(b)(2) and 90.175(b), as follows:
(1) Group A1 frequencies are available for voice and non-voice operations on a co-primary basis. Base, mobile and operational fixed stations will be authorized on Group A1 frequencies. Fixed stations may be licensed as mobile.
(2) Within 80 kilometers (50 miles) of the specified coordinates of the top 100 urban areas listed in § 90.741 of this chapter (“80 km circles”) only low power operation will be authorized. The coordinates of an operational fixed or base station and the geographic center (latitude and longitude) of a mobile area of operation determine whether a station is within an “80 km circle.”
(i) The maximum ERP for low power operation on Group A1 frequencies is as follows:
Operation Low side of frequency pair (watts) High side of frequency pair (watts)
Operational Fixed or Base 20 6
Mobile 6 6
Portable 2 2
(ii) The maximum antenna height for low power fixed stations on Group A1 frequencies will be 23 meters (75 feet) above ground.
(3) Outside the “80 km circles” defined in paragraph (b)(2), full-power operational fixed, base, or mobile stations will be authorized as follows:
(i) Power and antenna height limits are governed by § 90.205 of this chapter;
(ii) For any operational fixed, base or mobile station exceeding the low power or antenna height limits listed in paragraph (b)(2), the 21 dBu F(50,10) contour may not overlap any portion of an “80 km circle;” and,
(iii) Wide area operations will not be permitted. The area of normal day-to-day operations will be described in the application in terms of maximum distance from a geographic center (latitude and longitude).
(4) The Industrial/Business Pool Group A1 Low Power Frequencies are as follows:
451/456.18125 451/456.58125 452/457.10625 452/457.70625
451/456.1875 451/456.5875 452/457.1125 452/457.7125
451/456.19375 451/456.59375 452/457.11875 452/457.71875
451/456.28125 451/456.60625 452/457.13125 452/457.78125
451/456.2875 451/456.6125 452/457.1375 452/457.7875
451/456.29375 451/456.61875 452/457.14375 452/457.79375
451/456.30625 451/456.65625 452/457.15625 452/457.80625
451/456.3125 451/456.6625 452/457.1625 452/457.8125
451/456.31875 451/456.66875 452/457.16875 452/457.81875
451/456.35625 451/456.68125 452/457.18125 452/457.83125
451/456.3625 451/456.6875 452/457.1875 452/457.8375
451/456.36875 451/456.69375 452/457.19375 452/457.84375
451/456.38125 451/456.70625 452/457.28125 452/457.88125
451/456.3875 451/456.7125 452/457.2875 452/457.8875
451/456.39375 451/456.71875 452/457.29375 452/457.89375
451/456.40625 451/456.73125 452/457.48125 452/457.98125
451/456.4125 451/456.7375 452/457.4875 452/457.9875
451/456.41875 451/456.74375 452/457.49375 452/457.99375
451/456.45625 451/456.75625 452.53125 (unpaired) 462/467.18125
451/456.4625 451/456.7625 452.5375 (unpaired) 462/467.1875
451/456.46875 451/456.76875 452.54375 (unpaired) 462/467.19375
451/456.48125 452/457.03125 452/457.63125 462/467.45625
451/456.4875 452/457.0375 452/457.6375 462/467.4625
451/456.49375 452/457.04375 452/457.64375 462/467.46875
451/456.50625 452/457.05625 452/457.65625 462/467.48125
451/456.5125 452/457.0625 452/457.6625 462/467.4875
451/456.51875 452/457.06875 452/457.66875 462/467.49375
451/456.55625 452/457.08125 452/457.68125 462/467.50625
451/456.5625 452/457.0875 452/457.6875 462/467.5125
451/456.56875 452/457.09375 452/457.69375 462/467.51875
(c) Group A2 Frequencies. The Industrial/Business Pool frequencies in Group A2 are available nationwide on a coordinated basis, pursuant §§ 90.35(b)(2) and 90.175(b) as follows:
(1) Group A2 frequencies are available for voice and non-voice operations on a co-primary basis. Base, mobile or operational fixed stations will be authorized on Group A2 frequencies. Fixed stations may be licensed as mobile.
(2) Low power operation will be authorized nationwide on Group A2 frequencies.
(i) The maximum ERP for low power operation on these frequencies is as follows:
Operation Low side of frequency pair High side of frequency pair (watts)
Operational Fixed or Base 20 6
Mobile 6 6
Portable 2 2
(ii) The maximum antenna height for low power fixed stations will be 23 meters (75 feet) above ground.
(3) The Industrial/Business Pool Group A2 Low Power Frequencies are as follows:
451/456.23125 451/456.53125 452/457.40625 452/457.85625
451/456.2375 451/456.5375 452/457.4125 452/457.8625
451/456.24375 451/456.54375 452/457.41875 452/457.86875
451/456.33125 451/456.63125 452/457.50625
451/456.3375 451/456.6375 452/457.5125
451/456.34375 451/456.64375 452/457.51875
451/456.43125 452/457.30625 452/457.75625
451/456.4375 452/457.3125 452/457.7625
451/456.44375 452/457.31875 452/457.76875
(d) Group B Frequencies. The Industrial/Business Pool frequencies in Group B are available nationwide on a coordinated basis, pursuant to §§ 90.35(b)(2) and 90.175(b) as follows:
(1) Group B frequencies are available for non-voice operations on a primary basis. Voice operations will be permitted on a secondary basis. Base, mobile or operational fixed stations will be authorized on Group B frequencies. Fixed stations may be licensed as mobile.
(2) Operation on these frequencies is limited to 6 watts ERP for base, mobile or operational fixed stations and 2 watts ERP for portable units. A maximum antenna height of 7 meters (20 ft) above ground is authorized for fixed stations.
(3) The Industrial/Business Pool Group B Frequencies are as follows:
462/467.20625 462/467.28125 462/467.35625 462/467.43125
462/467.2125 462/467.2875 462/467.3625 462/467.4375
462/467.21875 462/467.29375 462/467.36875 462/467.44375
462/467.23125 462/467.30625 462/467.38125
462/467.2375 462/467.3125 462/467.3875
462/467.24375 462/467.31875 462/467.39375
462/467.25625 462/467.33125 462/467.40625
462/467.2625 462/467.3375 462/467.4125
462/467.26875 462/467.34375 462/467.41875
(e) Group C Frequencies. The Industrial/Business Pool frequencies in Group C are available nationwide for non-coordinated itinerant use as follows.
(1) Group C frequencies are available for voice and non-voice operations on a co-primary basis. Only mobile operations will be authorized on Group C frequencies. Stations may operate at fixed locations for a temporary period of time. No stations operating at a permanent fixed location will be authorized on Group C frequencies.
(2) Operation on these frequencies is limited to 6 watts effective radiated power for fixed or mobile units and 2 watts ERP for portable units. Stations operating at fixed locations for a temporary period of time will be limited to an antenna height of 7 meters (20 feet) above ground.
(3) The Industrial/Business Pool Group C Low Power Frequencies are as follows:
461/466.03125 461/466.15625 461/466.28125 462.8125
461/466.0375 461/466.1625 461/466.2875 462.8375 (unpaired)
461/466.04375 461/466.16875 461/466.29375 462/467.8625
461/466.05625 461/466.18125 461/466.30625 462/467.8875
461/466.0625 461/466.1875 461/466.3125 462/467.9125
461/466.06875 461/466.19375 461/466.31875 464/469.48125
461/466.08125 461/466.20625 461/466.33125 464/469.4875
461/466.0875 461/466.2125 461/466.3375 464/469.5125
461/466.09375 461/466.21875 461/466.34375 464/469.51875
461/466.10625 461/466.23125 461/466.35625 464/469.53125
461/466.1125 461/466.2375 461/466.3625 464/469.5375
461/466.11875 461/466.24375 461/466.36875 464/469.5625
461/466.13125 461/466.25625 462.7625 (unpaired) 464/469.56875
461/466.1375 461/466.2625 462.7875 (unpaired)
461/466.14375 461/466.26875 462.8125 (unpaired)
(f) Group D Frequencies. The Industrial/Business Pool frequencies in Group D are available on a coordinated basis, pursuant to §§ 90.35(b)(2) and 90.175(b). Central station alarm signaling on these frequencies are co-primary with regard to co-channel or adjacent channel base, mobile or data operations.
(1) Base, mobile or operational fixed stations will be authorized on Group D frequencies. Fixed stations may be licensed as mobile.
(2) Unless concurrence is obtained in accordance with section 90.175(b) of this chapter from the Commission-certified frequency coordinator for frequencies designated for central station alarm operations, Group D frequencies subject to § 90.35(c)(63) are limited to central station alarm use within the urban areas described in § 90.35(c)(63). Outside the urban areas described in § 90.35(c)(63), Group D frequencies subject to § 90.35(c)(63) are available for general Industrial/Business use on a coordinated basis, pursuant to § 90.35(b)(2) and § 90.175(b).
(3) Unless concurrence is obtained in accordance with section 90.175(b) of this chapter from the Commission-certified frequency coordinator for frequencies designated for central station alarm operations, Group D frequencies subject to § 90.35(c)(66) are limited to central station alarm use nationwide.
(4) Operation on Group D frequencies is limited to 2 watts output power for mobile, base or operational fixed stations. Fixed stations used for central station alarm operations may utilize antennas mounted not more than 7 meters (20 feet) above a man-made supporting structure, including antenna structure.
(5) The Industrial/Business Pool Group D Low Power Frequencies are as follows:
460/465.90625 460/465.95625 461/466.00625
460/465.9125 460/465.9625 461/466.0125
460/466.91875 460/465.96875 461/466.01875
460/465.93125 460/465.98125
460/465.9375 460/465.9875
460/465.94375 460/465.99375
(g) Low Power Public Safety Frequencies. The frequencies in the Public Safety Pool Low Power Group are available nationwide on a coordinated basis, pursuant to §§ 90.20(c)(2) and 90.175(b).
(1) Base, mobile or operational fixed stations will be authorized on Public Safety Low Power frequencies. Fixed stations may be licensed as mobile.
(2) Operation on these frequencies is limited to 6 watts effective radiated power for base, mobile or operational fixed stations and 2 watts ERP for portable units. A maximum antenna height of 7 meters (20 feet) above ground is authorized for fixed stations.
(3) The Public Safety Pool Low Power Frequencies are as follows:
453/458.03125 453/458.13125 453/458.95625 460/465.53125
453/458.0375 453/458.1375 453/458.9625 460/465.5375
453/458.04375 453/458.14375 453/458.96875 460/465.54375
453/458.05625 453/458.88125 453/458.98125 460/465.55625
453/458.0625 453/458.8875 453/458.9875 460/465.5625
453/458.06875 453/458.89375 453/458.99375 460/465.56875
453/458.08125 453/458.90625 460/465.48125
453/458.0875 453/458.9125 460/465.4875
453/458.09375 453/458.91875 460/465.49375
453/458.10625 453/458.93125 460/465.50625
453/458.1125 453/458.9375 460/465.5125
453/458.11875 453/458.94375 460/465.51875
(h) Unless otherwise noted, the following conditions apply to all low power frequencies:
(1) Except for itinerant operations on Group C, wide area operations will not be authorized. The area of normal day-to-day operations will be described in the application in terms of maximum distance from a geographic center (latitude and longitude).
(2) A hospital or health care institution holding a license to operate a radio station under this part may operate a medical radio telemetry device with an output power not to exceed 20 milliwatts without specific authorization from the Commission. All licensees operating under this authority must comply with the requirements and limitations set forth in this section.
(3) No limit shall be placed on the length or height above ground level of any commercially manufactured radiating transmission line when the transmission line is terminated in a non-radiating load and is routed at least 7 meters (20 feet) interior to the edge of any structure or is routed below ground level.
(4) Sea-based stations may utilize antennas mounted not more than 7 meters (20 feet) above a man-made supporting structure, including antenna structures.
(5) Continuous carrier operations are prohibited on these frequencies.
(6) Unless specified elsewhere in this part, licensees as of August 5, 1999, licensed for operations with an emission designator wider than 11.25 kHz on low power frequencies that are subject to an authorized bandwidth of 11.25 kHz, may obtain primary status with respect to co-channel licensees by supplying their coordinates to the Commission. These licensees will continue to operate on a secondary basis with respect to adjacent channel licensees. Additionally, these licensees may continue to operate with an authorized bandwidth wider than 11.25 kHz on such low power frequencies, subject to the provisions of § 90.209(b) of this chapter.
(7) Unless specified elsewhere in this part, licensees as of August 5, 1999, licensed for operations with an emission designator wider than 11.25 kHz on frequencies that are subject to an authorized bandwidth of 11.25 kHz, which are not low power frequencies, may obtain primary status with respect to co-channel licensees by modifying their license to low power frequencies, supplying their coordinates to the Commission, and otherwise complying with the conditions of paragraphs (b) through (g) of this section. These licensees will continue to operate on a secondary basis with respect to adjacent channel licensees. Additionally, these licensees may continue to operate with an authorized bandwidth wider than 11.25 kHz on such low power frequencies, subject to the provisions of § 90.209(b) of this chapter.
(8) Applicants proposing to operate with an authorized bandwidth wider than 11.25 kHz, on low power frequencies that are subject to an authorized bandwidth of 11.25 kHz, may be licensed on a secondary, non-interference basis. Such applicants are subject to the conditions of paragraphs (b) through (g) of this section and the provisions of § 90.209(b) of this chapter.

Where this section sits in the code

Title 47—Telecommunication
CHAPTER I—FEDERAL COMMUNICATIONS COMMISSION
SUBCHAPTER D—SAFETY AND SPECIAL RADIO SERVICES
PART 90—PRIVATE LAND MOBILE RADIO SERVICES
Subpart K—Standards for Special Frequencies or Frequency Bands

(b) Group A1 Frequencies. The Industrial/Business Pool frequencies in Group A1 are available on a coordinated basis, pursuant to §§ 90.35(b)(2) and 90.175(b), as follows:

(1) Group A1 frequencies are available for voice and non-voice operations on a co-primary basis. Base, mobile and operational fixed stations will be authorized on Group A1 frequencies. Fixed stations may be licensed as mobile.

(2) Within 80 kilometers (50 miles) of the specified coordinates of the top 100 urban areas listed in § 90.741 of this chapter (“80 km circles”) only low power operation will be authorized. The coordinates of an operational fixed or base station and the geographic center (latitude and longitude) of a mobile area of operation determine whether a station is within an “80 km circle.”

(i) The maximum ERP for low power operation on Group A1 frequencies is as follows:

Operation Low side of frequency pair (watts) High side of frequency pair (watts)

Operational Fixed or Base 20 6

Mobile 6 6

Portable 2 2

(ii) The maximum antenna height for low power fixed stations on Group A1 frequencies will be 23 meters (75 feet) above ground.

(3) Outside the “80 km circles” defined in paragraph (b)(2), full-power operational fixed, base, or mobile stations will be authorized as follows:

(i) Power and antenna height limits are governed by § 90.205 of this chapter;

(ii) For any operational fixed, base or mobile station exceeding the low power or antenna height limits listed in paragraph (b)(2), the 21 dBu F(50,10) contour may not overlap any portion of an “80 km circle;” and,

(iii) Wide area operations will not be permitted. The area of normal day-to-day operations will be described in the application in terms of maximum distance from a geographic center (latitude and longitude).

(4) The Industrial/Business Pool Group A1 Low Power Frequencies are as follows:

451/456.18125 451/456.58125 452/457.10625 452/457.70625

451/456.1875 451/456.5875 452/457.1125 452/457.7125

451/456.19375 451/456.59375 452/457.11875 452/457.71875

451/456.28125 451/456.60625 452/457.13125 452/457.78125

451/456.2875 451/456.6125 452/457.1375 452/457.7875

451/456.29375 451/456.61875 452/457.14375 452/457.79375

451/456.30625 451/456.65625 452/457.15625 452/457.80625

451/456.3125 451/456.6625 452/457.1625 452/457.8125

451/456.31875 451/456.66875 452/457.16875 452/457.81875

451/456.35625 451/456.68125 452/457.18125 452/457.83125

451/456.3625 451/456.6875 452/457.1875 452/457.8375

451/456.36875 451/456.69375 452/457.19375 452/457.84375

451/456.38125 451/456.70625 452/457.28125 452/457.88125

451/456.3875 451/456.7125 452/457.2875 452/457.8875

451/456.39375 451/456.71875 452/457.29375 452/457.89375

451/456.40625 451/456.73125 452/457.48125 452/457.98125

451/456.4125 451/456.7375 452/457.4875 452/457.9875

451/456.41875 451/456.74375 452/457.49375 452/457.99375

451/456.45625 451/456.75625 452.53125 (unpaired) 462/467.18125

451/456.4625 451/456.7625 452.5375 (unpaired) 462/467.1875

451/456.46875 451/456.76875 452.54375 (unpaired) 462/467.19375

451/456.48125 452/457.03125 452/457.63125 462/467.45625

451/456.4875 452/457.0375 452/457.6375 462/467.4625

451/456.49375 452/457.04375 452/457.64375 462/467.46875

451/456.50625 452/457.05625 452/457.65625 462/467.48125

451/456.5125 452/457.0625 452/457.6625 462/467.4875

451/456.51875 452/457.06875 452/457.66875 462/467.49375

451/456.55625 452/457.08125 452/457.68125 462/467.50625

451/456.5625 452/457.0875 452/457.6875 462/467.5125

451/456.56875 452/457.09375 452/457.69375 462/467.51875

(c) Group A2 Frequencies. The Industrial/Business Pool frequencies in Group A2 are available nationwide on a coordinated basis, pursuant §§ 90.35(b)(2) and 90.175(b) as follows:

(1) Group A2 frequencies are available for voice and non-voice operations on a co-primary basis. Base, mobile or operational fixed stations will be authorized on Group A2 frequencies. Fixed stations may be licensed as mobile.

(2) Low power operation will be authorized nationwide on Group A2 frequencies.

(i) The maximum ERP for low power operation on these frequencies is as follows:

Operation Low side of frequency pair High side of frequency pair (watts)

Operational Fixed or Base 20 6

Mobile 6 6

Portable 2 2

(ii) The maximum antenna height for low power fixed stations will be 23 meters (75 feet) above ground.

(3) The Industrial/Business Pool Group A2 Low Power Frequencies are as follows:

451/456.23125 451/456.53125 452/457.40625 452/457.85625

451/456.2375 451/456.5375 452/457.4125 452/457.8625

451/456.24375 451/456.54375 452/457.41875 452/457.86875

451/456.33125 451/456.63125 452/457.50625

451/456.3375 451/456.6375 452/457.5125

451/456.34375 451/456.64375 452/457.51875

451/456.43125 452/457.30625 452/457.75625

451/456.4375 452/457.3125 452/457.7625

451/456.44375 452/457.31875 452/457.76875

(d) Group B Frequencies. The Industrial/Business Pool frequencies in Group B are available nationwide on a coordinated basis, pursuant to §§ 90.35(b)(2) and 90.175(b) as follows:

(1) Group B frequencies are available for non-voice operations on a primary basis. Voice operations will be permitted on a secondary basis. Base, mobile or operational fixed stations will be authorized on Group B frequencies. Fixed stations may be licensed as mobile.

(2) Operation on these frequencies is limited to 6 watts ERP for base, mobile or operational fixed stations and 2 watts ERP for portable units. A maximum antenna height of 7 meters (20 ft) above ground is authorized for fixed stations.

(3) The Industrial/Business Pool Group B Frequencies are as follows:

462/467.20625 462/467.28125 462/467.35625 462/467.43125

462/467.2125 462/467.2875 462/467.3625 462/467.4375

462/467.21875 462/467.29375 462/467.36875 462/467.44375

462/467.23125 462/467.30625 462/467.38125

462/467.2375 462/467.3125 462/467.3875

462/467.24375 462/467.31875 462/467.39375

462/467.25625 462/467.33125 462/467.40625

462/467.2625 462/467.3375 462/467.4125

462/467.26875 462/467.34375 462/467.41875

(e) Group C Frequencies. The Industrial/Business Pool frequencies in Group C are available nationwide for non-coordinated itinerant use as follows.

(1) Group C frequencies are available for voice and non-voice operations on a co-primary basis. Only mobile operations will be authorized on Group C frequencies. Stations may operate at fixed locations for a temporary period of time. No stations operating at a permanent fixed location will be authorized on Group C frequencies.

(2) Operation on these frequencies is limited to 6 watts effective radiated power for fixed or mobile units and 2 watts ERP for portable units. Stations operating at fixed locations for a temporary period of time will be limited to an antenna height of 7 meters (20 feet) above ground.

(3) The Industrial/Business Pool Group C Low Power Frequencies are as follows:

461/466.03125 461/466.15625 461/466.28125 462.8125

461/466.0375 461/466.1625 461/466.2875 462.8375 (unpaired)

461/466.04375 461/466.16875 461/466.29375 462/467.8625

461/466.05625 461/466.18125 461/466.30625 462/467.8875

461/466.0625 461/466.1875 461/466.3125 462/467.9125

461/466.06875 461/466.19375 461/466.31875 464/469.48125

461/466.08125 461/466.20625 461/466.33125 464/469.4875

461/466.0875 461/466.2125 461/466.3375 464/469.5125

461/466.09375 461/466.21875 461/466.34375 464/469.51875

461/466.10625 461/466.23125 461/466.35625 464/469.53125

461/466.1125 461/466.2375 461/466.3625 464/469.5375

461/466.11875 461/466.24375 461/466.36875 464/469.5625

461/466.13125 461/466.25625 462.7625 (unpaired) 464/469.56875

461/466.1375 461/466.2625 462.7875 (unpaired)

461/466.14375 461/466.26875 462.8125 (unpaired)

(f) Group D Frequencies. The Industrial/Business Pool frequencies in Group D are available on a coordinated basis, pursuant to §§ 90.35(b)(2) and 90.175(b). Central station alarm signaling on these frequencies are co-primary with regard to co-channel or adjacent channel base, mobile or data operations.

(1) Base, mobile or operational fixed stations will be authorized on Group D frequencies. Fixed stations may be licensed as mobile.

(2) Unless concurrence is obtained in accordance with section 90.175(b) of this chapter from the Commission-certified frequency coordinator for frequencies designated for central station alarm operations, Group D frequencies subject to § 90.35(c)(63) are limited to central station alarm use within the urban areas described in § 90.35(c)(63). Outside the urban areas described in § 90.35(c)(63), Group D frequencies subject to § 90.35(c)(63) are available for general Industrial/Business use on a coordinated basis, pursuant to § 90.35(b)(2) and § 90.175(b).

(3) Unless concurrence is obtained in accordance with section 90.175(b) of this chapter from the Commission-certified frequency coordinator for frequencies designated for central station alarm operations, Group D frequencies subject to § 90.35(c)(66) are limited to central station alarm use nationwide.

(4) Operation on Group D frequencies is limited to 2 watts output power for mobile, base or operational fixed stations. Fixed stations used for central station alarm operations may utilize antennas mounted not more than 7 meters (20 feet) above a man-made supporting structure, including antenna structure.

(5) The Industrial/Business Pool Group D Low Power Frequencies are as follows:

460/465.90625 460/465.95625 461/466.00625

460/465.9125 460/465.9625 461/466.0125

460/466.91875 460/465.96875 461/466.01875

460/465.93125 460/465.98125

460/465.9375 460/465.9875

460/465.94375 460/465.99375

(g) Low Power Public Safety Frequencies. The frequencies in the Public Safety Pool Low Power Group are available nationwide on a coordinated basis, pursuant to §§ 90.20(c)(2) and 90.175(b).

(1) Base, mobile or operational fixed stations will be authorized on Public Safety Low Power frequencies. Fixed stations may be licensed as mobile.

(2) Operation on these frequencies is limited to 6 watts effective radiated power for base, mobile or operational fixed stations and 2 watts ERP for portable units. A maximum antenna height of 7 meters (20 feet) above ground is authorized for fixed stations.

(3) The Public Safety Pool Low Power Frequencies are as follows:

453/458.03125 453/458.13125 453/458.95625 460/465.53125

453/458.0375 453/458.1375 453/458.9625 460/465.5375

453/458.04375 453/458.14375 453/458.96875 460/465.54375

453/458.05625 453/458.88125 453/458.98125 460/465.55625

453/458.0625 453/458.8875 453/458.9875 460/465.5625

453/458.06875 453/458.89375 453/458.99375 460/465.56875

453/458.08125 453/458.90625 460/465.48125

453/458.0875 453/458.9125 460/465.4875

453/458.09375 453/458.91875 460/465.49375

453/458.10625 453/458.93125 460/465.50625

453/458.1125 453/458.9375 460/465.5125

453/458.11875 453/458.94375 460/465.51875

(h) Unless otherwise noted, the following conditions apply to all low power frequencies:

(1) Except for itinerant operations on Group C, wide area operations will not be authorized. The area of normal day-to-day operations will be described in the application in terms of maximum distance from a geographic center (latitude and longitude).

(2) A hospital or health care institution holding a license to operate a radio station under this part may operate a medical radio telemetry device with an output power not to exceed 20 milliwatts without specific authorization from the Commission. All licensees operating under this authority must comply with the requirements and limitations set forth in this section.

(3) No limit shall be placed on the length or height above ground level of any commercially manufactured radiating transmission line when the transmission line is terminated in a non-radiating load and is routed at least 7 meters (20 feet) interior to the edge of any structure or is routed below ground level.

(4) Sea-based stations may utilize antennas mounted not more than 7 meters (20 feet) above a man-made supporting structure, including antenna structures.

(5) Continuous carrier operations are prohibited on these frequencies.

(6) Unless specified elsewhere in this part, licensees as of August 5, 1999, licensed for operations with an emission designator wider than 11.25 kHz on low power frequencies that are subject to an authorized bandwidth of 11.25 kHz, may obtain primary status with respect to co-channel licensees by supplying their coordinates to the Commission. These licensees will continue to operate on a secondary basis with respect to adjacent channel licensees. Additionally, these licensees may continue to operate with an authorized bandwidth wider than 11.25 kHz on such low power frequencies, subject to the provisions of § 90.209(b) of this chapter.

(7) Unless specified elsewhere in this part, licensees as of August 5, 1999, licensed for operations with an emission designator wider than 11.25 kHz on frequencies that are subject to an authorized bandwidth of 11.25 kHz, which are not low power frequencies, may obtain primary status with respect to co-channel licensees by modifying their license to low power frequencies, supplying their coordinates to the Commission, and otherwise complying with the conditions of paragraphs (b) through (g) of this section. These licensees will continue to operate on a secondary basis with respect to adjacent channel licensees. Additionally, these licensees may continue to operate with an authorized bandwidth wider than 11.25 kHz on such low power frequencies, subject to the provisions of § 90.209(b) of this chapter.

(8) Applicants proposing to operate with an authorized bandwidth wider than 11.25 kHz, on low power frequencies that are subject to an authorized bandwidth of 11.25 kHz, may be licensed on a secondary, non-interference basis. Such applicants are subject to the conditions of paragraphs (b) through (g) of this section and the provisions of § 90.209(b) of this chapter.

Collected 2026-08-27T02:26:28Z. Source file · JSON

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